Project Trident: A Scientific Workflow Workbench is a set of tools—based on the Windows Workflow Foundation—that addresses scientists’ need for a flexible, powerful way to analyze large, diverse datasets. It provides graphical tools for creating, running, managing, and sharing workflows and can run workflows on a Windows HPC Server 2008 cluster. Project Trident also offers integration with myExperiment, an external workflow collaboration portal. Trident Workflow Application—available in Windows Presentation Foundation and Silverlight versions—provides a simple way to run Trident workflows. The Silverlight version enables users to run workflows remotely using a Silverlight-enabled browser, available for a variety of operating systems. Project Trident also provides a framework to add runtime services and comes with services such as provenance, workflow monitoring, and workflow-versioning support. Developers can extend Trident by implementing custom components to handle specialized processing requirements. Components include a Word 2007 add-in that runs workflows, stores them in a Word document, and reviews or changes parameters to rerun the workflows. Workflow inputs and outputs easily can be inserted into a Word document for reproducible research. A Trident Registry maintains libraries of workflows and activities, workflow inputs and outputs, workflow instances, and associated data products, and a security model supports users and roles; each user can have a personal workflow library and can share workflows with other users. And a Management Studio manages the Trident Registry and workflow execution, schedules workflows, and monitors workflow executions locally or remotely. Project Trident requires Microsoft .NET Framework 3.5 SP1 and either SQL Server Express, SQL Server 2005, or SQL Server 2008. The tool set also will support SQL Server Data Services when they become publically available.
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